interface SpeakHello {
	void speak();
}
class HelloMachine {
	public void turnOn(SpeakHello hello) {
	   hello.speak();
	}
}
public class Example7_3 {
	public static void main(String args[]) {
	  HelloMachine machine = new HelloMachine();
	  machine.turnOn( new SpeakHello() {
	                   public void speak(){
	                      System.out.println("hello,you are welcome!");
	                   }
	                }
	            );
	   machine.turnOn( new SpeakHello() {
	                   public void speak(){
	                      System.out.println("你好，欢迎光临!");
	                   }
	                }
	            );
	}
}